Viscosity and structure of MgO–SiO2-based slag melt with varying B2O3 content

Synthetic rutile was prepared from titanium slag melt with low energy consumption and a small amount of additive (B2O3) in our previous work. The modification mechanism of titanium slag was not clear enough. The migration and enrichment behaviors of Ca and Mg elements during cooling and crystallization of boron-bearing titanium slag melt were characterized by XRF, FESEM, EMPA, and XPS. Results show that when additive (B2O3) is added, Ti elements are migrated and enriched in the area to generate rutile, while Ca, Mg, and B elements are migrated and enriched in another area to generate borate. With the additive (B2O3) amount increased, Ca and Mg element migration is complete and more thorough. Additive (B2O3) promotes rutile formation and inhibits the formation of anosovite during cooling and crystallization of titanium slag melt. With the additive (B2O3) amount increasing from 0% to 6%, the proportion of Ti3+ in the modified titanium slag reduces from 9.15% to 0%, and the proportion of Ti4+ increases from 90.85% to 100% under the same cooling and crystallization condition. The result will lay the foundation for the efficient preparation of synthetic rutile by adding B2O3 to the titanium slag melt.

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The effect of B2O3 on the structure and properties of titanium slag melt by molecular dynamics simulations

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2021.08.032 ◽

2021 ◽

Author(s):

Helin Fan ◽

Ruixiang Wang ◽

Zhifeng Xu ◽

Huamei Duan ◽

Dengfu Chen

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulations ◽

Structure And Properties ◽

Titanium Slag ◽

Slag Melt ◽

Dynamics Simulations

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Raman spectroscopy study of high B2O3 content lead fluoroborate glasses

Journal of Raman Spectroscopy ◽

10.1002/(sici)1097-4555(199907)30:7<525::aid-jrs412>3.0.co;2-o ◽

1999 ◽

Vol 30 (7) ◽

pp. 525-529 ◽

Cited By ~ 6

Author(s):

A. G. Souza Filho ◽

I. Guedes ◽

P. T. C. Freire ◽

J. Mendes Filho ◽

M. C. C. Custódio ◽

...

Keyword(s):

Raman Spectroscopy ◽

Spectroscopy Study ◽

B2o3 Content

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03/02466 Steam boiler for combustion of lean anthracite culm in a slag melt

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(03)92595-1 ◽

2003 ◽

Vol 44 (6) ◽

pp. 398

Keyword(s):

Steam Boiler ◽

Anthracite Culm ◽

Slag Melt

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Microwave Dielectric Properties of Low-Temperature Sintered Ca[(Li1/3Nb2/3)0.95Zr0.05]O3−δ−0.04TiO2 Ceramics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.832 ◽

2012 ◽

Vol 535-537 ◽

pp. 832-835

Author(s):

Hui Xiong ◽

Gang Xiong ◽

Cui Hua She

Keyword(s):

Dielectric Properties ◽

Low Temperature ◽

Temperature Coefficient ◽

Sintering Temperature ◽

Microwave Dielectric Properties ◽

B2o3 Content ◽

Microwave Dielectric ◽

Resonator Frequency

The effects of B2O3 on the sinterability and microwave dielectric properties of Ca[(Li1/3Nb2/3)0.95Zr0.05]O3−δ−0.04TiO2 (CLNZ−0.04TiO2) ceramics were investigated . B2O3 doping can effectively reduce sintering temperatue by 150~200°C. The temperature coefficient of resonator frequency τf increased with an increase of B2O3 content and sintering temperatue. When B2O3 of 2wt% were added, the optimum microwave dielectric properties: εr =31.8,Qf =17240GHz and τf = − 5.9×10−6/°C were obtained at the sintering temperature of 950°C.

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The effects of Ca/Si ratio and B2O3 content on the dielectric properties of the CaO–B2O3–SiO2 glass–ceramics

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-019-01770-7 ◽

2019 ◽

Vol 30 (15) ◽

pp. 14053-14060 ◽

Cited By ~ 1

Author(s):

Yao Fu ◽

Pengzhen Li ◽

Huajie Tao ◽

Liming Zhang ◽

Miao Xin ◽

...

Keyword(s):

Dielectric Properties ◽

Glass Ceramics ◽

Sio2 Glass ◽

B2o3 Content

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Effect of B2O3 on the Crystallization Behavior of CaF2-Based Slag for Electroslag Remelting 9CrMoCoB Steel

Metals ◽

10.3390/met9121331 ◽

2019 ◽

Vol 9 (12) ◽

pp. 1331

Author(s):

Leizhen Peng ◽

Zhouhua Jiang ◽

Xin Geng ◽

Fubin Liu ◽

Huabing Li

Keyword(s):

Activation Energy ◽

Crystallization Behavior ◽

Three Dimensional ◽

Electroslag Remelting ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Caf2 Crystal ◽

B2o3 Content ◽

Good Surface ◽

Ingot Quality

The non-isothermal crystallization characteristics of the electroslag remelting (ESR)-type slag with varied B2O3 contents were investigated by non-isothermal differential scanning calorimetry (DSC), field emission scanning electron microscopy (SEM-EDS), and X-ray diffraction (XRD). The crystallization mechanism of the B2O3-bearing slag was also identified based on kinetics analysis. The results showed that the primary crystalline phase was CaF2, there was no change in the type of the primary crystal as B2O3 content increased, and the morphology of the CaF2 crystal was mainly dendritic. The sequence of crystal precipitation during the cooling process was CaF2 to Ca12Al14O32F2 and MgO/MgAl2O4, followed by Ca3B2O6. The activation energy of CaF2 crystallization increased firstly, then decreased and reached stability, while the activation energy of Ca3B2O6 crystallization increased continuously with the increasing B2O3 content. The crystallization behavior of CaF2 was three-dimensional growth with a constant nucleation rate. The proper B2O3 content added into the CaF2-based ESR slag should be around 1.0% to limit the precipitation of the CaF2 crystal to attain good surface ingot quality and stable ESR operation.

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